

import 'package:flutter/material.dart';
import 'package:flutter_image_compress/flutter_image_compress.dart';
import 'package:flutter_spinkit/flutter_spinkit.dart';
import 'package:path_provider/path_provider.dart' as path_provider;

import 'dart:io';

class HexColor extends Color {
  static int _getColorFromHex(String hexColor) {
    hexColor = hexColor.toUpperCase().replaceAll("#", "");
    if (hexColor.length == 6) {
      hexColor = "FF" + hexColor;
    }
    return int.parse(hexColor, radix: 16);
  }

  HexColor(final String hexColor) : super(_getColorFromHex(hexColor));
}


/// Used with [TabBar.indicator] to draw a horizontal line below the
/// selected tab.
///
/// The selected tab underline is inset from the tab's boundary by [insets].
/// The [borderSide] defines the line's color and weight.
///
/// The [TabBar.indicatorSize] property can be used to define the indicator's
/// bounds in terms of its (centered) widget with [TabIndicatorSize.label],
/// or the entire tab with [TabIndicatorSize.tab].
class MyUnderlineTabIndicator extends Decoration {
  /// Create an underline style selected tab indicator.
  ///
  /// The [borderSide] and [insets] arguments must not be null.
  const MyUnderlineTabIndicator({
    this.borderSide = const BorderSide(width: 2.0, color: Colors.white),
    this.insets = EdgeInsets.zero,
  })  : assert(borderSide != null),
        assert(insets != null);

  /// The color and weight of the horizontal line drawn below the selected tab.
  final BorderSide borderSide;

  /// Locates the selected tab's underline relative to the tab's boundary.
  ///
  /// The [TabBar.indicatorSize] property can be used to define the
  /// tab indicator's bounds in terms of its (centered) tab widget with
  /// [TabIndicatorSize.label], or the entire tab with [TabIndicatorSize.tab].
  final EdgeInsetsGeometry insets;

  @override
  Decoration lerpFrom(Decoration a, double t) {
    if (a is UnderlineTabIndicator) {
      return UnderlineTabIndicator(
        borderSide: BorderSide.lerp(a.borderSide, borderSide, t),
        insets: EdgeInsetsGeometry.lerp(a.insets, insets, t),
      );
    }
    return super.lerpFrom(a, t);
  }

  @override
  Decoration lerpTo(Decoration b, double t) {
    if (b is MyUnderlineTabIndicator) {
      return MyUnderlineTabIndicator(
        borderSide: BorderSide.lerp(borderSide, b.borderSide, t),
        insets: EdgeInsetsGeometry.lerp(insets, b.insets, t),
      );
    }
    return super.lerpTo(b, t);
  }

  @override
  _MyUnderlinePainter createBoxPainter([VoidCallback onChanged]) {
    return _MyUnderlinePainter(this, onChanged);
  }
}

class _MyUnderlinePainter extends BoxPainter {
  _MyUnderlinePainter(this.decoration, VoidCallback onChanged)
      : assert(decoration != null),
        super(onChanged);

  final MyUnderlineTabIndicator decoration;

  BorderSide get borderSide => decoration.borderSide;

  EdgeInsetsGeometry get insets => decoration.insets;

  Rect _indicatorRectFor(Rect rect, TextDirection textDirection) {
    assert(rect != null);
    assert(textDirection != null);
    final Rect indicator = insets.resolve(textDirection).deflateRect(rect);

    //希望的宽度
    double wantWidth = 13;
    //取中间坐标
    double cw = (indicator.left + indicator.right) / 2;
    return Rect.fromLTWH(cw - wantWidth / 2,
        indicator.bottom - borderSide.width, wantWidth, borderSide.width);
  }

  @override
  void paint(Canvas canvas, Offset offset, ImageConfiguration configuration) {
    assert(configuration != null);
    assert(configuration.size != null);
    final Rect rect = offset & configuration.size;
    final TextDirection textDirection = configuration.textDirection;
    final Rect indicator =
    _indicatorRectFor(rect, textDirection).deflate(borderSide.width / 2.0);
    final Paint paint = borderSide.toPaint()..strokeCap = StrokeCap.round;
    canvas.drawLine(indicator.bottomLeft, indicator.bottomRight, paint);
  }
}


/// 图片压缩 File -> File
Future<File>
imageCompressAndGetFile(File file) async {
  // if (file.lengthSync() < 200 * 1024) {
  //   return file;
  // }

  // var quality = 100;
  // if (file.lengthSync() > 4 * 1024 * 1024) {
  //   quality = 50;
  // } else if (file.lengthSync() > 2 * 1024 * 1024) {
  //   quality = 60;
  // } else if (file.lengthSync() > 1 * 1024 * 1024) {
  //   quality = 70;
  // } else if (file.lengthSync() > 0.5 * 1024 * 1024) {
  //   quality = 80;
  // } else if (file.lengthSync() > 0.25 * 1024 * 1024) {
  //   quality = 90;
  // }
  var dir = await path_provider.getTemporaryDirectory();

  var targetPath = dir.absolute.path +"/"+DateTime.now().millisecondsSinceEpoch.toString()+ ".jpg";

  var result = await FlutterImageCompress.compressAndGetFile(
    file.absolute.path,
    targetPath,
    minWidth: 100,
    quality: 60,
    rotate: 0,
  );

  print("压缩后：${file.lengthSync() / 1024}");

  return result;
}

class WorkSpace extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.transparent,
      width: 11.0,
      height: 11.0,
      child: SpinKitWave(
        itemBuilder: (_, int index) {
          return DecoratedBox(
            decoration: BoxDecoration(
              color: index.isEven ? Colors.red : Colors.blue,
            ),
          );
        },
        size: 60.0,
      ),
    );
  }
}

